Bumper unit



FIG. 1 is a front elevational view of the bumper unit showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is an enlarged left side elevational view thereof;

FIG. 4 is an enlarged right side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a bumper unit, as shown. 